Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
33 lines
629 B
C
33 lines
629 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* An integer based power function
|
|
*
|
|
* Derived from drivers/video/backlight/pwm_bl.c
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/math.h>
|
|
#include <linux/types.h>
|
|
|
|
/**
|
|
* int_pow - computes the exponentiation of the given base and exponent
|
|
* @base: base which will be raised to the given power
|
|
* @exp: power to be raised to
|
|
*
|
|
* Computes: pow(base, exp), i.e. @base raised to the @exp power
|
|
*/
|
|
u64 int_pow(u64 base, unsigned int exp)
|
|
{
|
|
u64 result = 1;
|
|
|
|
while (exp) {
|
|
if (exp & 1)
|
|
result *= base;
|
|
exp >>= 1;
|
|
base *= base;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL_GPL(int_pow);
|